Model Forum / Radio Controlled / Air Models / April 2004

   The single technique that I personally credit with keeping RF noise away
from servos is to ALWAYS make my own long leads so that I can use 3+,
22gauge wire for making them up.
   What I mean by "3+" is 3 wire plus a shield. What that is, is a 4 wire
cable that also has a foil shield wrapped around the wires inside a sleeve.
The 4th wire is a bare wire that contacts the shield foil the entire length
of the cable.
   To keep RF interence from glithching the servos with long leads, what
you do is to solder the cable up to the two end connectors as usual. But
here's the important part: Solder the bare (shield) wire together with the
ground wire ONLY at the receiver end connector. Do NOT solder the shield
wire to ANYTHING at the servo end. At the servo end of the harness, just
clip off the shield wire and leave it unconnected.
   In a couple of dozen plus years of R/C flying, I use mostly gas engines
and I have never experienced any glitching of servos connected up that way.
If you do, then you need to look at all the other things that make up the
system.

MJC